Common problems and treatment methods of microcomputer five-prevention system
The microcomputer five-prevention system provides technical means to prevent misoperation, adopts a forced lock function and convenient and quick issuance of operation tickets, but in actual applications, the following problems should also be paid attention to:
1 "Operation ticket expert system" failure solutions
" If the "operation ticket expert system" appears to crash, the operating system is running slowly, the database is damaged, etc., it should be disinfected in time, and the computer should be restarted to restore the backed-up database.
2. Possible problems with the computer key, causes and solutions
2.1 When operating the circuit breaker in the background, the five preventions are forbidden to operate. The reason is: ①There is no step to simulate the operation of the circuit breaker; ②The computer key is not placed in the transmission seat on the simulation screen; ③The communication light on the simulation screen is "on". ④Put the computer key into the transmission base, and wait for the display of "The circuit breaker can be operated" before the circuit breaker light flashes, then the background computer operation can be carried out; ⑤ Press the "Communication light" button, the communication light is "off", then the background computer can be started operating.
2.2 The computer key cannot receive the outgoing operation ticket. The reason is that the computer key has a ticket but has not entered the state of receiving tickets. The processing method is to clear the ticket with the computer key, and then insert it into the operation ticket transmission port to receive the ticket.
2.3 The computer key has displayed: "Correct, it can be unlocked", but the mechanical coded lock still cannot be opened. The reason is that the internal mechanism of the lock body is jammed; the battery is insufficient. The treatment method is to check whether there is debris or rust on the mechanical part of the lock body, and treat it with lubrication; replace another computer key, perform simulation operations in sequence according to the items that have not been operated, and charge the computer key without power. Ensure sufficient power during operation.
2.4 During operation, the computer key is inserted into the lock body and an "error, please check" is reported. The reason is that the mechanical coding lock is damaged or wrongly hung; it is operated at the wrong interval. The solution is to check whether the display content of the computer key is consistent with the content of the operating item after confirming that the operation interval is correct. It is recommended to strengthen management and check; confirm that the operation interval is correct.
2.5 When operating the circuit breaker, the computer key has displayed: "Electrical code lock unlocked and operable" and the circuit breaker cannot be closed. The reason is that the internal relay of the computer key is damaged; the computer key is in poor contact with the electric code lock. The solution is to replace another computer key and perform simulation operations in sequence according to the items that have not been operated yet.
3. Wrong ticket is issued or cannot be issued, and the five-prevention rules are incomplete, causing the operation ticket to be issued without the five-prevention judgment in a special way.
4. Strictly implement the universal unlocking key management system. Do
not use the universal unlocking key without authorization. Any lock can be opened, which is prone to misoperation. Therefore, when unlocking, you must strictly implement the universal unlocking key management system to be foolproof.
5. Incorrect operation During the
operation, the operator may only take the computer key and not the operation ticket. This is incorrect. Because the microcomputer five-prevention system only locks the primary equipment, and does not lock the secondary pressure plate and power circuit breaker, the missing secondary items may cause misoperation.
6. The operation and maintenance work is not in place. The
operation and maintenance work is not in place, and the rusty, jammed, and damaged mechanical code locks and computer keys cannot be overhauled and replaced in time; problems found during operation are not reported or dealt with, and the problems are shelved, causing safety hazards .
The management of the microcomputer "five prevention" system
1. Formulate the debugging simulation, operation and maintenance management regulations of the microcomputer "five prevention" locking device (monitoring) system: in accordance with the provisions of the State Grid Corporation "Management Regulations on the Prevention of Electrical Misoperation Devices", prevent errors The management of the device must be incorporated into the site regulations of the plant and station. At the same time when the microcomputer "five prevention" device is put into operation, the new station shall formulate the on-site microcomputer "five prevention" locking device operation regulations. Pay special attention to the regulations on the use of unlocking keys (master keys), and fill in the unlocking records. The leader must agree before use, and make a record after use.
2. Strengthen the anti-misoperation locking system of the microcomputerViolation assessment and training work: Strengthen the safety awareness and responsibility education of operators, increase the assessment and education of operator responsibility accidents, pay attention to daily technical training, strengthen basic skills training of operators, and continuously improve operators’ Quality.
3. Strengthen the training of the locking device for the operation duty officer. Carry out further detailed training for the operation personnel, so that the operation personnel not only know its use method, but also its main performance characteristics, matters that should be paid attention to when using it, and its maintenance method. Make it fully functional.
4. Equip each substation with special lockout maintenance box.
With the continuous development of the State Grid, the continuous update of technology, the development of computer technology and network communication technology, microcomputer anti-misoperation devices have been widely used in substations, which has improved the safety of switching operations and effectively suppressed misoperations The occurrence of the accident has greatly improved the reliability of the safe power supply of the power system of the substation.
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